Saw a thread today here and I realized I'd been wondering about the difference between a regular palm sander and a Random Orbital Sander (ROS). I have two sanders, both 1/4 sheet palm sanders, a DeWalt D26441 and a Makita BO4556K. Obviously, I'm thrifty thus the 1/4 sheet sanders. What am I missing by not having a Random Orbital Sander (ROS)?